Set a large skillet over medium heat and add the ground beef and onion. Season and crumble until fully cooked through. Set aside and reserve about 2 tbsp of fat in the pan, discarding the rest.
Add the sweet potato to the pan and lightly season with salt and pepper. Saute for 7-9 minutes or until tender and lightly crisp.
Add the ground beef and onion back to the pan and pour the cheese sauce over. Stir to combine, coating the skillet in the sauce.
If desired, add shredded dairy-free cheese on top. Transfer to the oven (set at 400F) and allow to melt.
Serve topped with chopped cilantro.
Notes
The shredded cheese is optional! It's just as good with just the cheese sauce, but the cheese on top just makes it cheesier looking and feeling. I recommend going with a homemade dairy-free cheese like this or this for AIP. For storebought, you can try this if you tolerate nightshades.